Fuse



Dec'. 1, 1925l 1,563,418

\ A. ADELMAN FUSE Filed 061'.; 9. 1924 YE-1;. IE-E- Arthur A de lvan 5511 I affanni Patented Dec. 1, 1925.

ARTHUR ADELMAN, or cHEsANING, MICHIAN. u

FUSE.

I'Alnplicacion filed October 9, 1924. Serial No. 742,669.

(GRANTED UNDER THE er or rumen s, 1883;,22 sur. I.. 625.)

'To all whom 'it magi-concern.'

Be it` known that I, ARTHUR ADELMAN,

a citizen of the United States, and a resident of Chesaning, county of Saginaw, and State of Michigan, have invented an AImprovement in Fuses,- of which the following is va specification.

The invention described herein may be used by the Government, or any of its officers or employees in prosecution of work for the Government, or by any other person in the United States, without payment to me of any royalty thereon, in accordance with the act ofMarch-3, 1883.

The subject of this invention is a fuse.

The primary object ofathe invention is Vto provide a sensitive strikerv carrying a iixed ring pi'n, which is normally held in un'-V armed position, movable to armed position by a centrifugally released member which may carry a ri-ng element, "and the striker at the same time extended to a position where it will function through statical air pressure to maintain the firing pin in armed position until` impact.

To these and other ends, my invention consists in the construction, arrangement,

. and combination of element-s, described hereinafter and pointed out in the claims form- .inga part of this specification, Severaly embodiments-oi:l my invention are yillustrated in the accompanying drawings, in which,

Fig. `1 isa longitudinal sectional view of a fuse constructed in accordance with the invention;

Fig. 2 is a sectional view taken on the line 2-2 of Fig. l;

Fi r3 1s 'a longitudinal'sectionai view showing a modified form of locking mechanism; and v Fig. 4 is a horizontal section on the line 4-4 of'Fig. 3. f

, Referring to the drawings by numerals of reference:

A fuse body 10 is formed with a transverse passagelll into which is inserted a cylindrical bolt 12 formed W'itha reduced extension 13 `which is adapted to pass ,through an aperture -14 in the fuse body.

The-extension 13 and the aperture y14 may t. e be s uared-to prevent 'rotation of the bolt.

The olt is confined in the passage 11 by means of a plate 1'5 suitably closing the opening. 1

, One-end of the bolt is provided with an aperture 13, in which `is frictionally retained a cup 1T carrying a firing element Aat consisting of a primer 18 and a detonator 19. Y The disc 18.

The bolt is maintained in unarmed position'by'means of pins 20. projecting into primer may be protected by a.

slots 21 formed in the bolt and each held in place'by a spring 22 confined between the pin and a cup 23, rigidly mounted ina recess 24 in the fuse ybody. When a projectile equipped with myv fuse attains a predeterinined rotational velocity, the pins arethrown outward by centrifugal force to permit the bolt, acting under the same force, to slide laterally until stopped by the fuse body when the rin element-will be disposed axially ofthe use and in line with a booster charge 25.' f

The upper portion of the bolt is notched.

as at 26, the inclined surface 27 of :the

vnotch extending to .a point adjacent the aperture 16.

oessed to carry a retaining ring 28 crimped The nose portion of the fuse body .is r- .into place and in which is slidably mounted v e. hollow striker head 29 having a central stem 30, the lower portion of which carries theshank 31 of a fixed firing pin 32. The iring pin is formed with a collar 33 interposed between the stem and fuse nbody and the pin normally extends through an aperture 34 in the fuse body to' bedisposed in I thenotched portion of the bolt. Asthe boltv moves to the left the iring in is cammed forward until`clear of the bo t and extrudes taining ring.

The forward portion of 'the stem is en- -the striker until an annular an'ge 35 formed thereon 4engages the inturned rim of. the relarged and hollowed' exteridrly las at 36 l and provided with ports 37 to permit the in flux of air into the striker head. The walls of the strikerliead are formed with/)aper-r turesv 38 which are in advance of the fuse v body when the striker is in armed sition to permit the passage; of air theret rough. l

by the static air pressure which is develo ed The firing pin is held in armed position t yThe air pressure exerting a constant force in all directions overcomes dynamic pressure on the exterior face of the striker head, sincle its ogival shape serves to deect a part of the force of the air current. When the fuse comes in contact 'with any object having an appreciable resistance to impact, such as an aeroplane fabric, the striker and firing pin will be moved rearwardly to primethe primerl and detonate the detonator.

In the modified formV shown in Figures 3 and 4, a fuse casing is formed with a hollowed head having an apertured nose for the reception of the striker which carries the ixe firing pin. .l

A member 39 in the casing carries a primer and is axially bored to receive the free end of the firing pin. The forward face of the member 89 is formed with a circular depression 40, having a wall 41 oblique to the axis of the fuse to constitute a seat for a .locking mechanism which supports the firing pin in unarmed position. The locking mechanism comprises a plurality of segments 42v preferably four in number, arranged symmetrically around the firing pin and held together by split rings 43 disposed in a circumferential groove 44. The limited movement of the striker head prevents the firing pin from being extracted from the locking members. Y

The segments are formed with inclined surfaces 45 to conform to theoblique wall 41 of the seat 40 and to facilitate assembly, the inclined surfaces are provided at either end of the segments. Y

When linear acceleration of the projectile ceases the locking members being no lon er opposed are free to be moved outwardly through centrifugal force. During this movement the locking members are constrained to move axially as well as radiallyof the fuseby reason of the oblique Wall 41 thereby causing the firing pin to move forwardly to armed position, and consequently, extruding the striker head to functioning position.

Onimpact the firing pin is free to be l -moved rearwardly to prime the primer as ythe segments will be held against the wall of the causin through centrifugal force.

-While 1n the foregoing there has-been ili lustrated and described such combination and arrangement of elements as constitute the preferred embodiment of my invention,

Vit is nevertheless desired to emphasize the fact that interpretation of the invention s hould only be conclusive when made in thel light of the subjoined claims;

a', fuse. body, said aperture in the body, a firing element disposed in one end of the bolt, said bolt formed with a central notch inclined towards the firing element, means for releasably holding the bolt in unarmed position, a firing pin normally disposed in the notched portion of the bolt and adapted to be cammed forward thereby, a striker head mounted in the nose of the fuse body andI adapted tomove with the firing pin, and aretaining ring for limiting the forward movement of the striker head.

2. A fuse including .a fuse body, said body formed with a transverse passage and an aperture in communication with `said pas-` sage, a bol-t slidably mounted in the passage and adapted to extend through the aperture in the body', a firing element carried in one end of the bolt, said bolt formed ,with a central notch, means for releasably holding the bolt in unarmed position, a firunarmed position, a firing pin normally dis-C posed in the notched portion of the bolt and adapted to be cammed thereby to armed p osit-ion, and means for holding the firing pin in armed position until impact.

4. A fuse including a fuse body, a bolt slidable transversely of the body, a firing element carried in one end of the bolt, `means for releasing said bolt to armed position during flight, a firing pin normally disposed in the path of the bolt and movable thereby to armed position, and a strikerv head movable in functioning position with the firing pin` for holding said pin'in armed position until impact.

-5. A fuse including a fuse b'ody,

a' boit' slidabletransversely of the body,\a firing element carried in one end of the bolt, means for releasing said bolt to armed position, and a ring pin normally disposed in the path, of the bolt and movable thereby to armed position.

(S. A safety tiring element in said member, and a firing device'lfor' fuses including a member slidable transversely of the fuse;- a

pin adapted to be moved to armed position by the member. Y

7. A fuse including an 'air balanceable striker head,'a fixed firing pin in said striker, and means operable during Hight. for exd truding the strikerto functioning position to hold the firing pin :in armed position, said means including a firing element.v

ARTHUR ADELMAN. 

